Răspunsuri

2014-11-12T17:54:15+02:00
A)  x= 18 sau -18
b)  x= multime vida
c)  2x-3=7 <=>2x=10 =>x=5
     2x-3=-7<=>2x= -4 =>x= -2
d)   5-8x=35 <=> -8x=30 => x= -3,7.. nu apartine lui Z
      5-8x= -35 <=> -8x=-40 => x=5
2014-11-12T17:54:45+02:00
B)multimea vida
c)2x-3=7
   2x=10
   x=5
  2x-3=-7
  2x=-4
  x=-2
d) 5-8x=-35
    -8x=-40
    x=5
   
   5-8x=35
   -8x=30
   x=30/(-8) nu apartine lui Z

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